<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <meta http-equiv="X-UA-Compatible" content="ie=edge" />
    <title>后盾人</title>
  </head>
  <body></body>
  <script>
    let hd = [1, 2, 3, 4, 5, 6];
    console.log(hd.copyWithin(3, 1, 3));
    // let arr = ["hdcms", "houdunren"];
    // let hd = [1, 2, 3, 4];
    // let cms = ["shop", "cms"];
    // arr = arr.concat(hd, cms);
    // arr = [...arr, ...hd, ...cms];
    // console.log(arr);
    // let str = "hdcms,houdunren";
    // let hd = str.split(",");
    // console.table(hd);
    // console.log(hd.join("-"));
  </script>
</html>
